Mercedes E-Class used price difference - why is this?

Parker's guide has a big price difference between a 320cdi(06) and a 320cdi Euro 4 - nearly £3000 for 07/07.

What's the difference please, and how do I tell which I am getting?

Asked on 18 March 2013 by John Wilson

Answered by Honest John
The difference is between the pre-facelift W211 E Class and the facelift. The facelift from autumn 2006 had something like 2,000 improvements and problem areas on the W211 were cured. You can tell the difference by the lights. The facelift has a sort of Venetian blind effect at the tops of the lenses of the main headlights.
Dear Honest John,

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